CN102820711A - Automatic control system of 10 kV-power transmission line - Google Patents
Automatic control system of 10 kV-power transmission line Download PDFInfo
- Publication number
- CN102820711A CN102820711A CN2012102837524A CN201210283752A CN102820711A CN 102820711 A CN102820711 A CN 102820711A CN 2012102837524 A CN2012102837524 A CN 2012102837524A CN 201210283752 A CN201210283752 A CN 201210283752A CN 102820711 A CN102820711 A CN 102820711A
- Authority
- CN
- China
- Prior art keywords
- circuit
- transmission line
- coil
- instrument transformer
- processing circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention discloses an automatic control system of a 10 kV-power transmission line. The system is characterized by comprising a working power supply, a detection mutual inductor, an information processing circuit and a terminal execution circuit, wherein an output end of the working power supply is respectively connected with an input end of the information processing circuit and a control end of the terminal execution circuit; an output end of the information processing circuit is connected with an input end of the terminal execution circuit; and the detection mutual inductor is connected with the information processing circuit. The working power supply of the system can be obtained unexpectedly without the condition that the working power supply is in contact connection with the 10 kV-power transmission line, so that the automatic control system of the 10 kV-power transmission line manufactured according to the embodiment of the invention can realize the following technical effects that the practical effectiveness is similar to a PT power source; the automatic control system is simple in manufacturing, low in cost, simple and convenient to construct and similar to a CT power source; the application range can be widened by more than 10 times; and an action part and a heat-emitting part are not required, so that the service life of the system is very long.
Description
Technical field
The present invention relates to a kind of 10kV transmission line automatic control system, belong to 10kV AC high-voltage electric transmission line technical field.
Background technology
In the 10kV transmission line of alternation current, in order to implement scientific management, power department was just putting forth effort to promote the automatic control system with multiple function in recent years.The different automatic control system of these forms all needs working power, but the 10kV alternating current circuit belongs to ultra-high-tension power transmission line, just like " bullet train that does not arrive at a station ", is not easy to use nearby.Under the prior art condition, normally solve this type problem like this: the one, external energy law---seek other energy, as utilize wind energy, solar energy etc. to convert electric energy to; This type of mode basic feasible solution, but complex equipments, cost is higher; And need often to safeguard that overall life is not long yet; The 2nd, PT power supply method---the input of 10kV voltage transformer is directly inserted the 10kV transmission line; Utilize the transformer action of 10kV voltage transformer working power to be provided for system; This method effect is fine; The energy that provides is the most sufficient, stable, but cost of manufacture higher, set up trouble be installed, promote being restricted on a large scale; The 3rd, CT power supply method---adopt the signal source and the working power (being connected in parallel on the two ends of 10kV current transformer secondary coil after the signal source of system and the working power series connection soon) of the secondary coil double as system of 10kV current transformer; This method is simple and easy to do; But practical function is not good enough---the prosecution error is big; Usage range narrow (be used for the large capacity transmission circuit only reluctantly, most its current transformer current transformation ratios that only are used for are the above 10kV transmission line of 200A/5A).
Summary of the invention
The objective of the invention is to overcome the shortcoming that prior art exists, a kind of simple and practical, 10kV transmission line automatic control system that cost is low is provided.
Technical scheme of the present invention is: a kind of 10kV transmission line automatic control system; Characteristics are; It comprises working power, detects instrument transformer, information-processing circuit and terminal executive circuit; The output of working power joins with the input of information-processing circuit and the control end of terminal executive circuit respectively, and the input of the output of information-processing circuit and terminal executive circuit joins, and detects instrument transformer and information-processing circuit and joins.
Described working power comprises energy collecting instrument transformer and DC circuit; The energy collecting instrument transformer is made up of annular core, primary coil and secondary coil; Wherein primary coil is made up of (because of the 10kV transmission line passes from the through hole of energy collecting instrument transformer the 10kV transmission line naturally; So the 10kV transmission line has just served as the primary coil of this instrument transformer naturally), secondary coil comprises two groups of independently coil 1-1H and coil 1-1L separately, wherein the hvdc circuit of coil 1-1H and DC circuit joins; The low-voltage dc circuit of coil 1-1L and DC circuit joins; Low-voltage dc circuit connects the input of information-processing circuit, and hvdc circuit connects the control end of terminal executive circuit, and the secondary coil of energy collecting instrument transformer (coil 1-1H and coil 1-1L) is not connected with the parts of detection signal are provided to system.
Said terminal executive circuit comprises electronic switch and operates a switch coil, the input of the output termination electronic switch of information-processing circuit, an end of the control termination drawing brake string circle of electronic switch, the output of another termination hvdc circuit of the coil of operating a switch.
The main feature of present technique scheme is two aspects: the one, and only there is annexation in working power with information-processing circuit and terminal executive circuit, and does not have annexation with the detection instrument transformer, and working power and input are taken their own roads, are not disturbed mutually; All there are the transmission relation of electromagnetic induction form separately in working power and detection instrument transformer with the 10kV transmission line.The 2nd, switch without relay, but directly drive by electronic switch.
The essential structure of energy collecting instrument transformer is similar to the 10kV current transformer in the native system; Special feature is: the emphasis that this energy collecting instrument transformer is stressed in the mill is to be prone to saturation characteristic or nonlinear characteristic, and with the manufacturing of 10kV current transformer in the emphasis stressed be that high linearity is just in time opposite.
The essential structure of detection instrument transformer and the 10kV current transformer of native system are as good as, and special feature is: the secondary coil of this instrument transformer only joins with signal processing circuit, is not connected with the parts of the energy are provided to system.
Because the working power of system of the present invention does not exist and 10kV transmission line contact annexation; Can make the working power " very unexpectedly " of system; So the 10kV transmission line automatic control system of implementing to make according to the present invention can realize following technique effect: practical usefulness is similar to PT power supply method; Convenient and swift, the prosecution error is very little; Make simply, with low cost, install, set up the easy CT of being similar to power supply method, the scope of application can be expanded more than 10 times, and does not have moving component and heat generating components in interior, and useful life is very long naturally.
Below in conjunction with accompanying drawing and embodiment the present invention is at length explained.
Description of drawings
Fig. 1 is a functional-block diagram of the present invention;
Fig. 2 is the basic block diagram of one embodiment of the invention.
The explanation of accompanying drawing drawing:
1-working power, 2-detect instrument transformer, 3-information-processing circuit, 4-terminal executive circuit, GND-system holds altogether;
1-1-energy collecting instrument transformer, the primary coil of 1-1Y-energy collecting instrument transformer (serving as naturally), 1-1T-annular core, one of secondary coil of 1-1H-energy collecting instrument transformer, two of the secondary coil of 1-1L-energy collecting instrument transformer by the 10kV transmission line;
1-2-DC circuit, 1-2H-hvdc circuit, 1-2L-low-voltage dc circuit;
The primary coil of 2-1-detection instrument transformer (serving as naturally) by the 10kV transmission line, the secondary coil of 2-2-detection instrument transformer;
4-L-electronic switch, g-electronic switch input, a-electronic switch controling end, k-electronic switch cold end, the 4-H-coil of operating a switch.
Embodiment
With reference to figure 1, Fig. 2, explain with regard to principal character part of the present invention emphatically:
This system comprises working power 1, detects instrument transformer 2, information-processing circuit 3 and terminal executive circuit 4, wherein,
Working power 1 comprises energy collecting instrument transformer 1-1 and DC circuit 1-2; Energy collecting instrument transformer 1-1 is made up of annular core 1-1T, primary coil 1-1Y and secondary coil; Secondary coil comprises two groups of independently coil 1-1H and coil 1-1L separately; Wherein the hvdc circuit 1-2H of coil 1-1H and DC circuit 1-2 joins, and coil 1-1L and low-voltage dc circuit 1-2L join, and the primary coil 1-1Y of energy collecting instrument transformer 1-1 is the 10kV transmission line;
Terminal executive circuit 4 comprises electronic switch 4-L and operates a switch coil 4-H;
The low-voltage dc circuit 1-2L of working power 1 connects the input of information-processing circuit 3; The input g of the output termination electronic switch 4-L of information-processing circuit 3; The control end a of electronic switch 4-L connects the end of the coil 4-H that operates a switch, the output of another termination hvdc circuit 1-2H of the coil 4-H that operates a switch;
Detect instrument transformer 2 and comprise primary coil 2-1 and secondary coil 2-2, primary coil 2-1 is the 10kV transmission line, and secondary coil 2-2 and information-processing circuit 3 join;
What the cold end of the cold end k of electronic switch 4-L and hvdc circuit 1-2H, low-voltage dc circuit 1-2L and information-processing circuit 3 was connected to system jointly holds GND commonly.
As can be seen from Figure 2, the vitals of working power 1 is energy collecting instrument transformer 1-1, and the primary coil 1-1Y of this instrument transformer is served as by the 10kV transmission line naturally; The primary coil 2-1 that detects instrument transformer 2 is also served as by the 10kV transmission line naturally.Here be noted that: coil 1-1Y and coil 2-1 are same transmission lines or are not that same transmission line do not change essence of the present invention; Do not influence the enforcement of technical scheme of the present invention yet, can carry out flexibly according to the concrete condition of circuit fully during the embodiment of the present invention technical scheme.
When native system inserts; The 10kV transmission line has just served as the primary coil of energy collecting instrument transformer 1-1 naturally, because the energy collecting instrument transformer has the saturated performance of being prone on making, so when having minimum electric current to pass through in the 10kV transmission line; Just can induce enough alternating voltages among its secondary coil 1-1H and the 1-1L; Becoming the dc supply of system after these two groups of alternating voltages process hvdc circuit 1-2H and low-voltage dc circuit 1-2L adjust, make system's instantaneous " eating and drinking to one's heart's content ", got into normal operating conditions immediately---low-voltage dc circuit 1-2L makes information-processing circuit 3 obtain working power; The ability that " devise strategies at the headquarters, issue order " arranged; Hvdc circuit 1-2H gives executive circuit 4 energy storage in terminal complete, is ready at all times to execute the task according to the instruction of information-processing circuit 3.On the other hand; Because the energy collecting instrument transformer has the saturated performance of being prone on making; So when increasing in the 10kV transmission line, the alternating voltage that the secondary coil 1-1H of energy collecting instrument transformer 1-1 and 1-1L induce does not increase (or increase seldom), this has just guaranteed system's steady operation (in the present embodiment in very large range; When 10kV transmission line electric current changed in the 5-1000A scope, system can operate as normal).
When native system inserts; The 10kV transmission line has just served as the primary coil 2-1 that detects instrument transformer 2 naturally, stresses that on making the linearity is high owing to detect instrument transformer, so when having electric current to pass through in the 10kV transmission line; Just all induce the alternating current proportional among its secondary coil 2-2 with primary current; This alternating current is met and sent off in the information-processing circuit 3, is handled and is judged by information-processing circuit 3, and which kind of instruction decision sends.As being that over-current signal need trip when outage when detected signal; Information-processing circuit 3 just sends " tripping operation " instruction---see a high level signal off to terminal executive circuit 4 inputs (being the input g of electronic switch 4-L); Impel the electronic switch conducting; Cause the energy of position of hvdc circuit 1-2H deposit to discharge the task that the powerful electromagnetic force of generation is finished immediately and operates a switch and cut off the power supply through the coil 4-H that operates a switch.On the other hand; Because the information that detection instrument transformer 2 detects is fully from the 10kV transmission line; Its secondary coil 2-2 only joins with signal processing circuit 3, does not connect the parts that the energy is provided to system, so can the guarantee information transmission can't harm; All the time with the 10kV transmission line in real current corresponding, this has just determined the accuracy and the stability of system works.In the present embodiment; What detect instrument transformer 2 usefulness is exactly common 10kV current transformer; The size of its current transformation ratio can be chosen according to the capacity of circuit that system covers fully flexibly, and the scope of choosing is 50A/5A-600A/5A, detects instrument transformer 2 and itself does not have special feature; Just method of attachment is special: the secondary coil 2-2 of this instrument transformer only joins with signal processing circuit 3, does not connect the parts that the energy is provided to system.
2 points also will be described in addition: the one, so-called " hvdc circuit " and " low-voltage dc circuit " is not said in the power industry " high pressure " and " low pressure " in the technical scheme of the present invention, be here both comparatively speaking." hvdc circuit " virtual voltage in this programme is advisable with 40-160VDC; The virtual voltage of " low-voltage dc circuit " is advisable with 5-30VDC.The 2nd, what electronic switch 4-L drew in the accompanying drawing 2 is a triode, and this is signal just, is actually the synthetic switching circuit of triode and thyristor groups (do not relate to core technology of the present invention here, therefore do not elaborate).Have 2 points with electronic switch at least without the superior part of relay: the one, do not promote the power consumption parts of relay work, can reduce the power consumption of whole system greatly, and not have action component and heat generating components, increase the service life; The 2nd, there is not relay contact, just there is not journey time yet, can realize truly " the instant tracking ", the system works performance is improved greatly.
Claims (4)
1. 10kV transmission line automatic control system; It is characterized in that; It comprises working power (1), detects instrument transformer (2), information-processing circuit (3) and terminal executive circuit (4); The output of working power (1) joins with the input of information-processing circuit (3) and the control end of terminal executive circuit (4) respectively; The input of the output of information-processing circuit (3) and terminal executive circuit (4) joins, and detects instrument transformer (2) and joins with information-processing circuit (3), and there are the transmission relation of electromagnetic induction form respectively in working power (1) and detection instrument transformer (2) with the 10kV transmission line.
2. 10kV transmission line automatic control system according to claim 1; It is characterized in that; Said working power (1) comprises energy collecting instrument transformer (1-1) and DC circuit (1-2); Energy collecting instrument transformer (1-1) is made up of annular core (1-1T), primary coil (1-1Y) and secondary coil, and secondary coil comprises two groups of independently coil (1-1H) and coils (1-1L) separately, and wherein coil (1-1H) joins with the hvdc circuit (1-2H) of DC circuit (1-2); Coil (1-1L) joins with the low-voltage dc circuit (1-2L) of DC circuit (1-2); The primary coil (1-1Y) of energy collecting instrument transformer (1-1) is the 10kV transmission line, and low-voltage dc circuit (1-2L) connects the input of information-processing circuit (3), and hvdc circuit (1-2H) connects the control end of terminal executive circuit (4).
3. 10kV transmission line automatic control system according to claim 1; It is characterized in that; Said terminal executive circuit (4) comprises electronic switch (4-L) and the coil of operating a switch (4-H); The input of the output termination electronic switch (4-L) of information-processing circuit (3), an end of the control termination drawing brake string circle (4-H) of electronic switch (4-L), the output of another termination hvdc circuit (1-2H) of the coil of operating a switch (4-H).
4. 10kV transmission line automatic control system according to claim 2 is characterized in that, the current transformer of said energy collecting instrument transformer (1-1) for having easy saturation characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102837524A CN102820711A (en) | 2012-08-10 | 2012-08-10 | Automatic control system of 10 kV-power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102837524A CN102820711A (en) | 2012-08-10 | 2012-08-10 | Automatic control system of 10 kV-power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102820711A true CN102820711A (en) | 2012-12-12 |
Family
ID=47304635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102837524A Pending CN102820711A (en) | 2012-08-10 | 2012-08-10 | Automatic control system of 10 kV-power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102820711A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326476A (en) * | 2013-03-15 | 2013-09-25 | 烟台市华能电器有限公司 | Special-power mutual inductor for automatic control system of high-voltage power transmission line |
| CN106451326A (en) * | 2016-11-15 | 2017-02-22 | 国网山东省电力公司蓬莱市供电公司 | A 10kV distribution line CT power supply control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3223687A1 (en) * | 1982-06-25 | 1984-01-05 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Power supply device for excess-current trip devices having microprocessors |
| US4567540A (en) * | 1983-06-22 | 1986-01-28 | S&C Electric Company | Power supply for a circuit interrupter |
| CN1392576A (en) * | 2001-06-19 | 2003-01-22 | 施耐德电器工业公司 | Electronic tripping device including capacitor as trippin coil power source |
| CN101697430B (en) * | 2009-11-12 | 2011-09-28 | 上海交通大学 | Power control method based CT electricity getting device of high voltage transmission line |
-
2012
- 2012-08-10 CN CN2012102837524A patent/CN102820711A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3223687A1 (en) * | 1982-06-25 | 1984-01-05 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Power supply device for excess-current trip devices having microprocessors |
| US4567540A (en) * | 1983-06-22 | 1986-01-28 | S&C Electric Company | Power supply for a circuit interrupter |
| CN1392576A (en) * | 2001-06-19 | 2003-01-22 | 施耐德电器工业公司 | Electronic tripping device including capacitor as trippin coil power source |
| CN101697430B (en) * | 2009-11-12 | 2011-09-28 | 上海交通大学 | Power control method based CT electricity getting device of high voltage transmission line |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326476A (en) * | 2013-03-15 | 2013-09-25 | 烟台市华能电器有限公司 | Special-power mutual inductor for automatic control system of high-voltage power transmission line |
| CN106451326A (en) * | 2016-11-15 | 2017-02-22 | 国网山东省电力公司蓬莱市供电公司 | A 10kV distribution line CT power supply control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2525472A1 (en) | Electronic current transformer based on complete self-excitation power supply | |
| CN102854366B (en) | Low current measuring device and low current measuring method in direct-current power distribution and consumption system | |
| CN103995165A (en) | Automatic adjusting device and adjusting method for multi-transformation ratio current transformer | |
| CN103872672A (en) | Novel saturated iron core high-temperature superconductive current limiter served as harmonic suppressor | |
| CN102820711A (en) | Automatic control system of 10 kV-power transmission line | |
| CN202334319U (en) | Power supply convertor with AC/DC (Alternating Current/Direct Current) selective output | |
| CN104319910A (en) | Power source energy taking circuit based on high-voltage power transmission line | |
| CN202759213U (en) | Automatic control system for high voltage transmission line | |
| CN103077816B (en) | Intelligent voltage transformer | |
| CN202008919U (en) | Zigzag transformer for low-voltage distribution network | |
| CN105655975A (en) | Protective device applied to rural distribution network distribution transformer | |
| CN203707738U (en) | Power-down time-delay under-voltage controller | |
| CN204792384U (en) | Capacitanc cluster shunt transformer | |
| CN204408004U (en) | Double loop power supply inlet wire switching device shifter | |
| CN203179688U (en) | Intelligent voltage transformer | |
| CN201765916U (en) | Microwave oven high voltage transformer and microwave oven comprising the same | |
| CN202281825U (en) | Intelligent electric energy meter built-in load switch test circuit | |
| CN201638648U (en) | Microwave oven high-tension transformer and microwave oven comprising same | |
| CN206023363U (en) | A kind of micro-capacitance sensor exchanges intelligent power distribution cabinet | |
| CN216252533U (en) | A system power circuit | |
| CN204010996U (en) | Dry-type distribution transformer with split winding | |
| CN104200978B (en) | A kind of current transformer intelligent electricity-fetching method | |
| CN203339656U (en) | Earth leakage protection device for ground wire | |
| CN204131130U (en) | A kind of battery saving arrangement based on intelligent AC electrical network | |
| CN201887450U (en) | Current-limiting adjustable protector circuit for AC circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121212 |